光ファイバを用いた瞬き測定

概要

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Eye blinks have been researched as one of the indicators to know the tiredness and sleepiness. We constructed the measuring system of eye blinking with an optical fiber to detect it easily, cheaply, and accurately. The eye blinking is detected by the variation of light intensities reflected from an eye and its surroundings. It is shown that blinking waveforms and intervals of them can be measured by using the composed system. Then, it is confirmed that the blinking waveform, that is, the behavior of eyelid has the individual variation. Moreover, we observed that eye blinking intervals show the different variations according to the state of the observation. In addition, to keep the accuracy of eye blinking detection, the output signal processing that the output signals are normalized by the mean values of their neighbor output signals is considered.